What is the goal of Mobile SSO?

What is the goal of Mobile SSO?
A. Log into services and apps, without a corporate VPN connection and without entering credentials.
B. Log into services and apps, without a corporate VPN connection and with entering app-specific credentials.
C. Log into services and apps, with a corporate VPN connection and without entering credentials.
D. Log into services and apps, with a corporate VPN connection and without entering app-specific credentials.